US20150082061A1 - Information Handling System Docking with Cable Based Power and Video Management - Google Patents
Information Handling System Docking with Cable Based Power and Video Management Download PDFInfo
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- US20150082061A1 US20150082061A1 US14/026,220 US201314026220A US2015082061A1 US 20150082061 A1 US20150082061 A1 US 20150082061A1 US 201314026220 A US201314026220 A US 201314026220A US 2015082061 A1 US2015082061 A1 US 2015082061A1
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- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Definitions
- the present invention relates in general to the field of information handling system docking, and more particularly to information handling system docking with cable based power and video management.
- An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information.
- information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated.
- the variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications.
- information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems.
- Information handling systems perform a large number of functions for both individuals and for business use. Generally, information handling systems perform these functions by executing applications stored in local memory that create or alter information stored locally and at networked locations.
- enterprises typically have a data center that includes centralized storage of information and one or more server information handling systems that provide the information to client information handling systems through a network.
- employees have work areas with a dedicated desktop information handling system that executes word processing, spreadsheet, web browsing and e-mail applications and connectivity to peripheral devices and platforms, that also may generate or consume data, so that employees can perform enterprise duties.
- each work area has a dedicated local area network Ethernet interface to provide the desktop information handling system with communication to the data center.
- each area includes dedicated and/or shared peripherals, such as a display, keyboard, mouse and shared networked printer.
- peripherals such as a display, keyboard, mouse and shared networked printer.
- a router or modem that provides Internet access and peripheral sharing instead of around a data center and server information handling system.
- This conventional work area configuration makes sense for employees who work only in the work area during working hours, however, a growing number of employees work in less-conventional arrangements. For instance, many enterprises have adopted home office policies that allow employees to work from home on certain days or under certain circumstances. Generally, such employees are provided with a portable information handling system to perform enterprise duties. As the expense associated with such portable systems has decreased over time, enterprises have made portable systems available to a greater number of employees so that employees have the improved productivity generally provided by improved access to enterprise information. In addition, employees have generally taken advantage of the decreased cost of portable information handling systems by purchasing systems for personal use.
- portable information handling systems often purchased for personal use by employees is the smartphone, which allows employees to make phone calls, communicate by text and e-mail, and browse the Internet through personal wireless wide area network (WWAN) telephone accounts or Internet hotspots.
- WWAN personal wireless wide area network
- portable information handling systems provide end users with increased convenience in the accessing of information outside of a work space
- portable information handling systems tend to have less convenient input/output interfaces.
- portable information handling systems tend to have smaller displays than are provided by a desktop system display peripheral and integrated keyboards with smaller and/or less ergonomic key configurations.
- the integrated keyboard is typically a virtual keyboard presented on a touchscreen, which generally does not provide an efficient interface for end users to make inputs.
- peripheral devices such as wireless keyboards and mice; however, the convenience of using a portable information handling system is diminished where an end user has to carry around peripheral devices and set up the portable system to interact with the peripheral devices.
- a docking station that interfaces the portable information handling system with the work space resources.
- Conventional docking stations typically include a specialized connector that couples to a portable information handling system to provide direct system access for peripherals connected with the docking station. For example, a docking station with a specialized connector is placed in a work space on a desktop and then interfaced with work space peripherals.
- the docking station might, for instance, include: a DisplayPort port that couples the dock through a DisplayPort cable to a conventional display; USB ports that couple the dock through USB cables to a keyboard, mouse and printer; an Ethernet port that couples the dock to a local area network (LAN); and a power cable that accepts AC power and an adapter that converts the AC power to DC power.
- a portable information handling system has a specialized port in its bottom surface that accepts the docking station connector in a fixed position on the desktop. The specialized port interfaces at a motherboard level with components of the portable information handling system so that an end user, in effect, couples separately to each of the peripherals through one docking station connector as if the end user had directly interfaced each peripheral to a port of the portable information handling system.
- a portable information handling system with a clamshell configuration interfaces with a docking station in a closed position so that processing components interact with external peripherals, such as an external display and keyboard, while the integrated display and keyboard are unavailable.
- the portable information handling system essentially becomes a desktop system when interfaced with the docking station.
- a difficulty with using a docked portable information handling system by interacting only through external I/O devices is that an end user sometimes has difficulty determining the operational status of the docked system. For instance, if the docked system enters a powered down or off state, an end user may have to open the system and interact with integrated I/O devices in order to bring the external peripheral devices to an operational state.
- a disadvantage of conventional docking stations is that the addition of a specialized docking port and direct motherboard connections increases the design and fabrication costs for the portable information handling system as well as the size of the portable system. It also limits the type of client device that connects/docks with the docking platform.
- One alternative is to interface a docking station with a standardized port of the information handling system, such as a USB port.
- a disadvantage of this type of docking station interface is that peripheral information can exceed the bandwidth available through the standardized port. Further, using the peripheral port protocol to communicate with the docking station tends to introduce latency due to translation between native and port protocols.
- Some of the bandwidth limitations are addressed by using wireless interfaces for some peripherals, such as Bluetooth to interface a portable system with a keyboard; however, using multiple interfaces tends to defeat the simplicity associated with a docking station having a single interface.
- Another alternative is to define a specialized cable interface that provides bandwidth for multiple interface protocols, such as DisplayPort and USB, so that a portable information handling system can dock with external peripherals through a cable connector instead of a mother-board based connector.
- a disadvantage of a cable docking solution is that the inclusion of a specialized port in the housing of the information handling system decreases the room available for other types of ports.
- a further difficulty with a cable docking solution is that the docking station may be placed distal the information handling system and even out of sight. If the end user lacks a direct ability to physically access the docking station, the end user must interface with a power button of the information handling system to power up and down the information handling system.
- a system and method are provided which substantially reduce the disadvantages and problems associated with previous methods and systems for interfacing an information handling system to a docking station in a work space.
- An input device integrated into a docking cable accepts an end user input and, in response to the end user input, adjusts a power state of an information handling system associated with a docking station. For example, each activation of the input device transitions an information handling system between selected ACPI power states. Commands to transition power states are coordinated by firmware of the information handling system and/or by firmware of the docking station.
- a docking station has one or more docking station ports that interface with one or more information handling systems through one or more docking cables, and plural peripheral ports that interface with peripheral device, such as displays, printers, keyboards, mice, etc. . . .
- a docking manager of the docking station coordinates peripheral, power and networking resources for use by an information handling system through communications supported by the docking cable and wireless networking resources.
- An input device integrated in the docking cable proximate a connector for an information handling system accepts end user inputs that adjust the power state of the information handling system, such as by cycling through ACPI states with each end user input as preset by an end user.
- the integrated input device is a manual button that generates a signal for communication to the information handling system or docking station, such as an interrupt, that indicates an end user desire to transition from a reduced power state to an on state or vice versa.
- the integrated input device is a fingerprint authentication device that communicates authentication of authorization of an end user to access and/or power up an information handling system interfaced with the docking cable.
- a command to transition states at an information handling system may be generated with firmware of the information handling system in response to a signal from the input device sent through the cable, or may be generated at a docking station for communication to the information handling system through the docking cable or a wireless interface.
- the present invention provides a number of important technical advantages.
- One example of an important technical advantage is that an end user may dock an information handling system to a docking station with I/O devices inactive and/or inaccessible, yet transition the information handling system between power states without interacting directly with an information handling system I/O device.
- a portable information handling system having a clamshell housing that rotates between open and closed positions transitions between ACPI power states in response to activation of a mechanical button integrated in a docking cable that initiates an interrupt detected by firmware on the information handling system.
- the unavailability of a power button or keyboard at the information handling system does not prevent use of the information handling system, such as when a system having a clamshell housing is in a closed configuration.
- Transition between power states by activation of the integrated input device may be performed with a signal sent directly from the input device to the information handling system or by coordination through the docking station.
- the integrated input device includes an authentication device, such as a fingerprint authenticator, that authorizes access to the information handling system before transitioning the power state.
- FIG. 1 depicts a portable information handling systems interfaced with a docking station and associated peripherals in a work space;
- FIG. 2 depicts a block diagram of an information handling system and docking station interfaced by a docking cable with an integrated input device to transition power states of the information handling system;
- FIG. 3 depicts a flow diagram of a process for transitioning an information handling system power state based upon an input at a device integrated in a docking station cable;
- FIG. 4 depicts a block diagram of a docking station conversion unit integrated in docking cable for converting visual information between plural formats.
- a docking station cable interface includes an input device integrated with the cable to interact with an information handling system coupled to a dock with the cable.
- an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes.
- an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price.
- the information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components.
- RAM random access memory
- processing resources such as a central processing unit (CPU) or hardware or software control logic
- ROM read-only memory
- Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display.
- I/O input and output
- the information handling system may also include one or more buses operable to transmit communications between the various hardware components.
- a portable information handling system 10 interfaces with a docking station 12 and associated peripherals in a work space 14 .
- information handling system 10 is a portable information handling system having a rotationally-coupled display 16 and a keyboard 18 integrated with a portable housing 20 , such as a conventional laptop with a clamshell configuration.
- other types of portable information handling systems may interface with docking station 12 , such as a mobile telephone 22 or similar tablet information handling system.
- portable information handling system 12 interfaces with a docking cable 24 that couples to a port of docking station 12 and portable information handling system 10 .
- portable information handling system 10 couples directly to docking station 12 , such as by aligning an integrated docking port of portable information handling 10 over a docking port of docking station 12 .
- Docking station 12 provides an end user with a ready conversion at a work space 14 of portable information handling system 10 into a desktop-type of fixed configuration that interfaces with plural peripheral devices.
- docking station 12 supports communication between information handling system 10 and a peripheral keyboard 26 , a peripheral mouse 28 , plural peripheral displays 30 , peripheral speakers 32 , a peripheral printer 34 and a peripheral telephone 36 , such as a VoIP desktop telephone.
- Docking station 12 interfaces with the peripherals through cables that couple each peripheral to a peripheral port of docking station 12 or, alternatively, through wireless communication by wireless resources through a WLAN/WPAN antenna 38 .
- Information handling system 10 communicates through docking cable 24 with docking station 12 to receive peripheral inputs and present outputs at the peripherals coupled to docking station 12 .
- Docking station 12 provides a single connection point through which information handling system 10 interacts with the plural peripherals.
- docking station 12 provides infrastructure support to portable information handling system 10 for power and networking functions.
- an Ethernet local area network (LAN) interface 40 provides network communications to docking station 12 to route and/or switch to portable information handling system 10 .
- LAN local area network
- an external AC power connector 42 of docking station 12 accepts power from an AC supply and converts the power to a DC supply for transfer to information handling system 10 through docking cable 24 .
- docking station 12 supports operations of information handling system 10 through a single docking cable 24 by multiplexing information through plural data lanes of docking cable 24 .
- docking cable 24 combines a DisplayPort interface, with four data lanes, an auxiliary lane and a power interface, and a USB 2.0 interface, with two data lanes, to communicate visual and other peripheral information.
- Docking station 12 configures the data lanes and available wireless resources so that portable information handling system 10 operates in an efficient and effective manner.
- some examples of configurations include: four data lanes for DisplayPort and two data lanes for USB 2.0; two data lanes for DisplayPort and four data lanes for USB 3.0; and two data lanes for a first DisplayPort interface, two data lanes for a second DisplayPort interface, and two data lanes for a USB 2.0 interface.
- additional data lanes may be included to support additional configurations.
- Docking managers of docking station 12 and information handling system 10 coordinate assignments of data lanes and wireless resources to meet processing needs and goals of an end user of information handling system 10 .
- Some examples of configurations of data lanes are set forth in U.S. patent application Ser. No. 13/962,222, entitled “Information Handling System Docking with Coordinated Power and Data Communication,” having the same inventors and assignee as the present application, and incorporated herein by reference as if fully set forth.
- information handling system 10 has display 16 rotated to an open position relative to portable housing 20 so that integrated keyboard 18 is accessible to an end user.
- a power switch 44 is accessible to an end user with display 16 rotated to an open position so that an end user can power up or down information handling system 10 .
- display 16 rotates to a closed position over portable housing 20 power switch 44 and keyboard 18 become inaccessible so that an end user has to open display 16 in order to power up information handling system 10 to an on state from an off state, a hibernate state or a sleep state, such as the power states defined in ACPI S0 through S5 power states.
- an end user may desire to leave display 16 in a closed position yet have access to a power button for manually selecting a power state at information handling system 10 .
- an input device 46 is integrated in docking cable 24 to accept manual inputs by an end user for selection of power states of information handling system 10 .
- input device 46 is located at an end of docking cable 24 proximate to the connector that interfaces with information handling system 10 .
- input device may be located at different points of docking cable 24 .
- input device 46 mimics the operation of power switch 44 so that an end user essentially has remote access to power switch 44 regardless of the position of display 16 .
- input device 46 provides remote access that mimics other types of input device integrated in portable housing 20 , such as a fingerprint authentication device.
- Input device 46 interfaces with signal, power and or ground lines of docking cable 24 so that activation by an end user is communicated through docking cable 24 to information handling system 10 or docking station 12 .
- a dedicated auxiliary signal line of docking cable 24 receives a signal upon activation of input device 46 so that both information handling system 10 and docking station 12 respond to a request by an end user for a change to the information handling system power state.
- activation of input device 46 simulates a wake event using an auxiliary signal line, such as a simulation of a lid opening, a power switch press, a keyboard input, a mouse movement, a wake on WLAN or Bluetooth, or other type of wake event.
- the simulation may result from a signal sent directly from input device 46 or, alternatively, from a signal sent from input device 46 to docking station 12 that generates a power transition command, such as a wireless wake event.
- a status indicator is included with input device 46 to indicate show the status of information handling system 10 as sleep, suspend, ready, awake, etc. . . .
- different colors of LED devices illuminate a finger print authentication device to indicate the status of information handling system 10 , with power supplied by a power line of docking cable 24 and authentication indicated by a temporary ground of the power line.
- input device 46 has intelligence provided by a thin client system-on-chip (SoC) architecture so that docking cable 24 performs as a traditional thin client even if an information handling system 10 is not interfaced.
- SoC thin client system-on-chip
- a manual button of input device 46 wakes the thin client even if no device is connected to docking cable 24 .
- An SoC architecture supports authentication, such as with a smartcard sensor or fingerprint sensor, and stores credential to provide verification of an authorized end user with an encrypted message sent through docking station 12 .
- information gathered by a sensor at input device 46 is provided in an encrypted message to docking station 12 or information handling system 10 to allow authentication remote from input device 46 .
- FIG. 2 a block diagram depicts an information handling system 10 and docking station 12 interfaced by a docking cable 24 with an integrated input device 46 to transition power states of the information handling system 10 .
- Docking cable 24 has opposing ends with docking cable connectors 48 , one of which is adapted to couple to information handling system 10 and the other adapted to couple to docking station 12 .
- Input device 46 is integrated with docking cable 24 proximate to the docking cable connector 48 adapted to couple with a docking port 50 of information handling system 10 .
- input device 46 is built into docking cable connector 48 to be located directly next to information handling system 10 when coupled to docking port 50 .
- input device 46 includes a fingerprint reader 52 and a mechanical button 54 .
- Fingerprint reader 52 is powered from a power line of docking cable 24 and communicates through an auxiliary communication line, such as a DisplayPort auxiliary channel.
- Manual button 54 accepts a manual input that provides a temporary connection of the auxiliary communication line of docking cable 24 to ground to indicate a manual input through the auxiliary communication line.
- input device 46 includes alternative detection schemes for detecting an end user input and communicating the input to information handling system 10 or docking station 12 .
- a docking manager at information handling system 10 and docking station 12 coordinate the response of information handling system 10 to an input at input device 46 .
- Docking manager 56 at information handling system 10 includes firmware instructions that monitor docking port 50 to detect inputs indicative of a change in power state.
- power for running docking manager 56 is provided from docking cable 24 to allow a response to signals even when information handling system 10 is in an off state.
- docking manager 56 Upon detection of an input, docking manager 56 provides the input to an embedded controller 58 for action according to system firmware, such as the system BIOS running on embedded controller 58 .
- embedded controller 58 applies ACPI controller logic 59 to respond to inputs received from input device 46 as if the inputs were received from a system power switch or keyboard.
- embedded controller 58 responds to an input at input device 46 by returning the system to an on state. If the input is maintained for a predetermined time period, embedded controller 58 responds by forcing a power down to an off state, such as would happen if power switch 44 were held.
- detection of an input at input device 46 with information handling system 10 powered up provides an indication of an informed undock via the operating system so that attached devices cease data transfers in lieu of an impending undocking event.
- input device 46 interfaces with a docking cable connector 48 release device to provide notice of an end user release of information handling system 10 from its connection to docking station 12 .
- a fingerprint authentication module 64 receives inputs made at fingerprint reader 52 to authorized end user access to information handling system 10 .
- input device 46 communicates inputs to docking station 12 through docking cable 24 so that a docking manager 56 on docking station 12 can manage changes in the power state of information handling system 10 in response to the inputs.
- docking manager 56 detects a manual input to mechanical button 54 or a fingerprint reading from fingerprint reader 52 to an embedded controller 58 that runs firmware logic for changing the power state of information handling system 10 .
- a wireless network module 66 sends a wireless wake signal, such as a wake on wireless local area network or wake on Bluetooth signal to a wireless network module 66 of information handling system 10 to initiate a change in power state, such as a recovery from a reduced power state to an on state.
- fingerprint authenticator 64 authenticates the end user based upon information provided by fingerprint reader 52 and, based upon the authentication, initiates a wireless wake with wireless network module 66 .
- docking manager 56 and/or embedded controller 58 communicates a command to transition power states to information handling system 10 through docking cable 24 .
- a command sent through docking cable 24 to docking manager 56 of information handling system 10 simulates an interrupt at embedded controller 58 that would result from an input made at a keyboard or mouse during an S3 reduced power state.
- Similar elements are depicted at information handling system 10 and docking station 12 to implement power state transitions in response to an input at input device 46 , the functions of waking and sleeping information handling system 10 may be distributed across a variety of different hardware and software components.
- a flow diagram depicts a process for transitioning an information handling system power state based upon an input at a device integrated in a docking station cable.
- the process begins at step 68 with detection of an input made at an input device integrated in the docking cable, such as pushing a mechanical button or reading a fingerprint.
- a timer is set at the docking station to monitor whether the information handling system responds to the input within a time limit.
- the input is detected at the information handling system for an appropriate response, such as initiation of a power transition between power states, such as ACPI power states.
- a determination is made of whether the information handling system has responded before expiration of the timer.
- step 74 the process continues to step 76 to initiate a response to the input with the docking station 76 , such as by sending a command with a wireless wake signal.
- step 78 the docking station initiates the response to the input button, such as by commanding a transition of the power state at the information handling system. In one embodiment, if an information handling system fails to acknowledge the command, the docking station presents an error at a display for the end user.
- FIG. 4 a block diagram depicts a docking station conversion unit integrated in docking cable 24 for converting visual information between plural formats.
- docking cable 24 includes a docking cable integrated conversion module 80 that converts information from a standard protocol, such as USB, to a docking station protocol, such as will interface through a docking station connector 48 .
- a USB connector 82 interfaces with an information handling system USB port to accept information formatted with the USB protocol.
- the USB formatted information includes compressed display information and other types of information, such as network communications and peripheral device communications.
- the USB formatted information is communicated to a USB hub 84 , where the compressed display information is separated and forwarded to a display module 86 for decompression.
- Non-display information is forwarded from USB hub 84 to a docking manager 56 , where it is forwarded on through USB lanes in the USB protocol.
- Display module 86 decompresses the display information into uncompressed pixel level information, such as with the DisplayPort protocol, and provides the DisplayPort formatted information to docking manager 56 and docking connector 48 for communication to a docking station.
- Docking cable integrated conversion module 80 provides an intermediate integrated cable tool that converts USB formatted information for use by a docking station 12 .
- Docking station 12 sees the connection as a normal docking connection so that legacy information handling systems that lack docking station ports can interface with docking station peripherals, albeit at a slower data transfer rate.
- power transfer may be provided with a power transfer module that converts power provided from docking connector 48 according to the DisplayPort protocol to power provided by the USB protocol for use by the information handling system at USB connector 82 .
- an information handling system that has a docking station connector interfaces with a USB docking station by connecting USB connector 82 to the USB docking station and connecting the docking station connector 48 to the information handling system.
Abstract
Description
- 1. Field of the Invention
- The present invention relates in general to the field of information handling system docking, and more particularly to information handling system docking with cable based power and video management.
- 2. Description of the Related Art
- As the value and use of information between and across devices continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems.
- Information handling systems perform a large number of functions for both individuals and for business use. Generally, information handling systems perform these functions by executing applications stored in local memory that create or alter information stored locally and at networked locations. As an example, enterprises typically have a data center that includes centralized storage of information and one or more server information handling systems that provide the information to client information handling systems through a network. In a conventional office environment, employees have work areas with a dedicated desktop information handling system that executes word processing, spreadsheet, web browsing and e-mail applications and connectivity to peripheral devices and platforms, that also may generate or consume data, so that employees can perform enterprise duties. Generally, each work area has a dedicated local area network Ethernet interface to provide the desktop information handling system with communication to the data center. In addition, each area includes dedicated and/or shared peripherals, such as a display, keyboard, mouse and shared networked printer. Often home office environments have a similar configuration built around a router or modem that provides Internet access and peripheral sharing instead of around a data center and server information handling system.
- This conventional work area configuration makes sense for employees who work only in the work area during working hours, however, a growing number of employees work in less-conventional arrangements. For instance, many enterprises have adopted home office policies that allow employees to work from home on certain days or under certain circumstances. Generally, such employees are provided with a portable information handling system to perform enterprise duties. As the expense associated with such portable systems has decreased over time, enterprises have made portable systems available to a greater number of employees so that employees have the improved productivity generally provided by improved access to enterprise information. In addition, employees have generally taken advantage of the decreased cost of portable information handling systems by purchasing systems for personal use. One common example of portable information handling systems often purchased for personal use by employees is the smartphone, which allows employees to make phone calls, communicate by text and e-mail, and browse the Internet through personal wireless wide area network (WWAN) telephone accounts or Internet hotspots.
- Although portable information handling systems provide end users with increased convenience in the accessing of information outside of a work space, portable information handling systems tend to have less convenient input/output interfaces. For example, portable information handling systems tend to have smaller displays than are provided by a desktop system display peripheral and integrated keyboards with smaller and/or less ergonomic key configurations. In the case of tablet information handling systems, such as smartphones, the integrated keyboard is typically a virtual keyboard presented on a touchscreen, which generally does not provide an efficient interface for end users to make inputs. Often, end users will interface with smartphones and other tablet information handling systems by using peripheral devices, such as wireless keyboards and mice; however, the convenience of using a portable information handling system is diminished where an end user has to carry around peripheral devices and set up the portable system to interact with the peripheral devices.
- One conventional solution that helps make portable information handling systems more effective tools in a work space is a docking station that interfaces the portable information handling system with the work space resources. Conventional docking stations typically include a specialized connector that couples to a portable information handling system to provide direct system access for peripherals connected with the docking station. For example, a docking station with a specialized connector is placed in a work space on a desktop and then interfaced with work space peripherals. The docking station might, for instance, include: a DisplayPort port that couples the dock through a DisplayPort cable to a conventional display; USB ports that couple the dock through USB cables to a keyboard, mouse and printer; an Ethernet port that couples the dock to a local area network (LAN); and a power cable that accepts AC power and an adapter that converts the AC power to DC power. A portable information handling system has a specialized port in its bottom surface that accepts the docking station connector in a fixed position on the desktop. The specialized port interfaces at a motherboard level with components of the portable information handling system so that an end user, in effect, couples separately to each of the peripherals through one docking station connector as if the end user had directly interfaced each peripheral to a port of the portable information handling system.
- The advantage offered by a conventional docking station is that an end user can effectively turn a portable information handling system with limited I/O capabilities into a desktop system with multiple peripherals by simply placing the portable system into the docking station. As an example, a portable information handling system with a clamshell configuration interfaces with a docking station in a closed position so that processing components interact with external peripherals, such as an external display and keyboard, while the integrated display and keyboard are unavailable. In such an example, the portable information handling system essentially becomes a desktop system when interfaced with the docking station. A difficulty with using a docked portable information handling system by interacting only through external I/O devices is that an end user sometimes has difficulty determining the operational status of the docked system. For instance, if the docked system enters a powered down or off state, an end user may have to open the system and interact with integrated I/O devices in order to bring the external peripheral devices to an operational state.
- A disadvantage of conventional docking stations is that the addition of a specialized docking port and direct motherboard connections increases the design and fabrication costs for the portable information handling system as well as the size of the portable system. It also limits the type of client device that connects/docks with the docking platform. One alternative is to interface a docking station with a standardized port of the information handling system, such as a USB port. A disadvantage of this type of docking station interface is that peripheral information can exceed the bandwidth available through the standardized port. Further, using the peripheral port protocol to communicate with the docking station tends to introduce latency due to translation between native and port protocols. Some of the bandwidth limitations are addressed by using wireless interfaces for some peripherals, such as Bluetooth to interface a portable system with a keyboard; however, using multiple interfaces tends to defeat the simplicity associated with a docking station having a single interface. Another alternative is to define a specialized cable interface that provides bandwidth for multiple interface protocols, such as DisplayPort and USB, so that a portable information handling system can dock with external peripherals through a cable connector instead of a mother-board based connector. A disadvantage of a cable docking solution is that the inclusion of a specialized port in the housing of the information handling system decreases the room available for other types of ports. A further difficulty with a cable docking solution is that the docking station may be placed distal the information handling system and even out of sight. If the end user lacks a direct ability to physically access the docking station, the end user must interface with a power button of the information handling system to power up and down the information handling system.
- Therefore, a need has arisen for a system and method which supports end user interaction with a docked information handling system at a cable interface of the dock and the information handling system.
- In accordance with the present invention, a system and method are provided which substantially reduce the disadvantages and problems associated with previous methods and systems for interfacing an information handling system to a docking station in a work space. An input device integrated into a docking cable accepts an end user input and, in response to the end user input, adjusts a power state of an information handling system associated with a docking station. For example, each activation of the input device transitions an information handling system between selected ACPI power states. Commands to transition power states are coordinated by firmware of the information handling system and/or by firmware of the docking station.
- More specifically, a docking station has one or more docking station ports that interface with one or more information handling systems through one or more docking cables, and plural peripheral ports that interface with peripheral device, such as displays, printers, keyboards, mice, etc. . . . A docking manager of the docking station coordinates peripheral, power and networking resources for use by an information handling system through communications supported by the docking cable and wireless networking resources. An input device integrated in the docking cable proximate a connector for an information handling system accepts end user inputs that adjust the power state of the information handling system, such as by cycling through ACPI states with each end user input as preset by an end user. For example, the integrated input device is a manual button that generates a signal for communication to the information handling system or docking station, such as an interrupt, that indicates an end user desire to transition from a reduced power state to an on state or vice versa. As another example, the integrated input device is a fingerprint authentication device that communicates authentication of authorization of an end user to access and/or power up an information handling system interfaced with the docking cable. A command to transition states at an information handling system may be generated with firmware of the information handling system in response to a signal from the input device sent through the cable, or may be generated at a docking station for communication to the information handling system through the docking cable or a wireless interface.
- The present invention provides a number of important technical advantages. One example of an important technical advantage is that an end user may dock an information handling system to a docking station with I/O devices inactive and/or inaccessible, yet transition the information handling system between power states without interacting directly with an information handling system I/O device. For instance, a portable information handling system having a clamshell housing that rotates between open and closed positions transitions between ACPI power states in response to activation of a mechanical button integrated in a docking cable that initiates an interrupt detected by firmware on the information handling system. Since the docking cable button is separate from the information handling system, the unavailability of a power button or keyboard at the information handling system does not prevent use of the information handling system, such as when a system having a clamshell housing is in a closed configuration. Transition between power states by activation of the integrated input device may be performed with a signal sent directly from the input device to the information handling system or by coordination through the docking station. In one embodiment, the integrated input device includes an authentication device, such as a fingerprint authenticator, that authorizes access to the information handling system before transitioning the power state.
- The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings. The use of the same reference number throughout the several figures designates a like or similar element.
-
FIG. 1 depicts a portable information handling systems interfaced with a docking station and associated peripherals in a work space; -
FIG. 2 depicts a block diagram of an information handling system and docking station interfaced by a docking cable with an integrated input device to transition power states of the information handling system; -
FIG. 3 depicts a flow diagram of a process for transitioning an information handling system power state based upon an input at a device integrated in a docking station cable; and -
FIG. 4 depicts a block diagram of a docking station conversion unit integrated in docking cable for converting visual information between plural formats. - A docking station cable interface includes an input device integrated with the cable to interact with an information handling system coupled to a dock with the cable. For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components.
- Referring now to
FIG. 1 , a portableinformation handling system 10 interfaces with adocking station 12 and associated peripherals in awork space 14. In the example embodiment,information handling system 10 is a portable information handling system having a rotationally-coupleddisplay 16 and akeyboard 18 integrated with aportable housing 20, such as a conventional laptop with a clamshell configuration. In alternative embodiments, other types of portable information handling systems may interface withdocking station 12, such as amobile telephone 22 or similar tablet information handling system. In the example embodiment, portableinformation handling system 12 interfaces with adocking cable 24 that couples to a port ofdocking station 12 and portableinformation handling system 10. In alternative embodiments, portableinformation handling system 10 couples directly todocking station 12, such as by aligning an integrated docking port of portable information handling 10 over a docking port ofdocking station 12. -
Docking station 12 provides an end user with a ready conversion at awork space 14 of portableinformation handling system 10 into a desktop-type of fixed configuration that interfaces with plural peripheral devices. For example,docking station 12 supports communication betweeninformation handling system 10 and aperipheral keyboard 26, a peripheral mouse 28, pluralperipheral displays 30,peripheral speakers 32, aperipheral printer 34 and aperipheral telephone 36, such as a VoIP desktop telephone.Docking station 12 interfaces with the peripherals through cables that couple each peripheral to a peripheral port ofdocking station 12 or, alternatively, through wireless communication by wireless resources through a WLAN/WPAN antenna 38.Information handling system 10 communicates throughdocking cable 24 withdocking station 12 to receive peripheral inputs and present outputs at the peripherals coupled todocking station 12.Docking station 12 provides a single connection point through whichinformation handling system 10 interacts with the plural peripherals. In addition,docking station 12 provides infrastructure support to portableinformation handling system 10 for power and networking functions. For example, an Ethernet local area network (LAN)interface 40 provides network communications todocking station 12 to route and/or switch to portableinformation handling system 10. As another example, an externalAC power connector 42 ofdocking station 12 accepts power from an AC supply and converts the power to a DC supply for transfer toinformation handling system 10 throughdocking cable 24. - In operation,
docking station 12 supports operations ofinformation handling system 10 through asingle docking cable 24 by multiplexing information through plural data lanes ofdocking cable 24. For example, dockingcable 24 combines a DisplayPort interface, with four data lanes, an auxiliary lane and a power interface, and a USB 2.0 interface, with two data lanes, to communicate visual and other peripheral information.Docking station 12 configures the data lanes and available wireless resources so that portableinformation handling system 10 operates in an efficient and effective manner. In the example embodiment, some examples of configurations include: four data lanes for DisplayPort and two data lanes for USB 2.0; two data lanes for DisplayPort and four data lanes for USB 3.0; and two data lanes for a first DisplayPort interface, two data lanes for a second DisplayPort interface, and two data lanes for a USB 2.0 interface. In alternative embodiments, additional data lanes may be included to support additional configurations. Docking managers ofdocking station 12 andinformation handling system 10 coordinate assignments of data lanes and wireless resources to meet processing needs and goals of an end user ofinformation handling system 10. Some examples of configurations of data lanes are set forth in U.S. patent application Ser. No. 13/962,222, entitled “Information Handling System Docking with Coordinated Power and Data Communication,” having the same inventors and assignee as the present application, and incorporated herein by reference as if fully set forth. - In the example depiction presented by
FIG. 1 ,information handling system 10 hasdisplay 16 rotated to an open position relative toportable housing 20 so thatintegrated keyboard 18 is accessible to an end user. In addition, apower switch 44 is accessible to an end user withdisplay 16 rotated to an open position so that an end user can power up or downinformation handling system 10. Whendisplay 16 rotates to a closed position overportable housing 20,power switch 44 andkeyboard 18 become inaccessible so that an end user has to opendisplay 16 in order to power upinformation handling system 10 to an on state from an off state, a hibernate state or a sleep state, such as the power states defined in ACPI S0 through S5 power states. In some instances, an end user may desire to leavedisplay 16 in a closed position yet have access to a power button for manually selecting a power state atinformation handling system 10. In order to provide this flexibility to an end user, aninput device 46 is integrated indocking cable 24 to accept manual inputs by an end user for selection of power states ofinformation handling system 10. In one example embodiment,input device 46 is located at an end of dockingcable 24 proximate to the connector that interfaces withinformation handling system 10. In alternative embodiments, input device may be located at different points ofdocking cable 24. In an example embodiment,input device 46 mimics the operation ofpower switch 44 so that an end user essentially has remote access topower switch 44 regardless of the position ofdisplay 16. In alternative embodiments,input device 46 provides remote access that mimics other types of input device integrated inportable housing 20, such as a fingerprint authentication device. -
Input device 46 interfaces with signal, power and or ground lines ofdocking cable 24 so that activation by an end user is communicated throughdocking cable 24 toinformation handling system 10 ordocking station 12. For instance, in one embodiment a dedicated auxiliary signal line ofdocking cable 24 receives a signal upon activation ofinput device 46 so that bothinformation handling system 10 anddocking station 12 respond to a request by an end user for a change to the information handling system power state. As another example, activation ofinput device 46 simulates a wake event using an auxiliary signal line, such as a simulation of a lid opening, a power switch press, a keyboard input, a mouse movement, a wake on WLAN or Bluetooth, or other type of wake event. The simulation may result from a signal sent directly frominput device 46 or, alternatively, from a signal sent frominput device 46 todocking station 12 that generates a power transition command, such as a wireless wake event. In one embodiment, a status indicator is included withinput device 46 to indicate show the status ofinformation handling system 10 as sleep, suspend, ready, awake, etc. . . . For instance, different colors of LED devices illuminate a finger print authentication device to indicate the status ofinformation handling system 10, with power supplied by a power line ofdocking cable 24 and authentication indicated by a temporary ground of the power line. - In alternative embodiments,
input device 46 has intelligence provided by a thin client system-on-chip (SoC) architecture so that dockingcable 24 performs as a traditional thin client even if aninformation handling system 10 is not interfaced. A manual button ofinput device 46 wakes the thin client even if no device is connected to dockingcable 24. An SoC architecture supports authentication, such as with a smartcard sensor or fingerprint sensor, and stores credential to provide verification of an authorized end user with an encrypted message sent throughdocking station 12. Alternatively, information gathered by a sensor atinput device 46 is provided in an encrypted message todocking station 12 orinformation handling system 10 to allow authentication remote frominput device 46. - Referring now to
FIG. 2 , a block diagram depicts aninformation handling system 10 anddocking station 12 interfaced by adocking cable 24 with anintegrated input device 46 to transition power states of theinformation handling system 10.Docking cable 24 has opposing ends withdocking cable connectors 48, one of which is adapted to couple toinformation handling system 10 and the other adapted to couple todocking station 12.Input device 46 is integrated withdocking cable 24 proximate to thedocking cable connector 48 adapted to couple with adocking port 50 ofinformation handling system 10. In one embodiment,input device 46 is built intodocking cable connector 48 to be located directly next toinformation handling system 10 when coupled to dockingport 50. In the example embodiment,input device 46 includes afingerprint reader 52 and amechanical button 54.Fingerprint reader 52 is powered from a power line ofdocking cable 24 and communicates through an auxiliary communication line, such as a DisplayPort auxiliary channel.Manual button 54 accepts a manual input that provides a temporary connection of the auxiliary communication line ofdocking cable 24 to ground to indicate a manual input through the auxiliary communication line. In alternative embodiments,input device 46 includes alternative detection schemes for detecting an end user input and communicating the input toinformation handling system 10 ordocking station 12. - In operation, a docking manager at
information handling system 10 anddocking station 12 coordinate the response ofinformation handling system 10 to an input atinput device 46.Docking manager 56 atinformation handling system 10 includes firmware instructions that monitordocking port 50 to detect inputs indicative of a change in power state. In one embodiment, power for runningdocking manager 56 is provided from dockingcable 24 to allow a response to signals even wheninformation handling system 10 is in an off state. Upon detection of an input,docking manager 56 provides the input to an embeddedcontroller 58 for action according to system firmware, such as the system BIOS running on embeddedcontroller 58. For instance, embeddedcontroller 58 appliesACPI controller logic 59 to respond to inputs received frominput device 46 as if the inputs were received from a system power switch or keyboard. As an example, in an ACPI S3 state with asystem processor 60 powered down and an operating system stored inRAM 62, embeddedcontroller 58 responds to an input atinput device 46 by returning the system to an on state. If the input is maintained for a predetermined time period, embeddedcontroller 58 responds by forcing a power down to an off state, such as would happen ifpower switch 44 were held. In one embodiment, detection of an input atinput device 46 withinformation handling system 10 powered up provides an indication of an informed undock via the operating system so that attached devices cease data transfers in lieu of an impending undocking event. For instance,input device 46 interfaces with adocking cable connector 48 release device to provide notice of an end user release ofinformation handling system 10 from its connection todocking station 12. Afingerprint authentication module 64 receives inputs made atfingerprint reader 52 to authorized end user access toinformation handling system 10. - In an alternative embodiment,
input device 46 communicates inputs todocking station 12 throughdocking cable 24 so that adocking manager 56 ondocking station 12 can manage changes in the power state ofinformation handling system 10 in response to the inputs. For instance,docking manager 56 detects a manual input tomechanical button 54 or a fingerprint reading fromfingerprint reader 52 to an embeddedcontroller 58 that runs firmware logic for changing the power state ofinformation handling system 10. In the example of a manual input, awireless network module 66 sends a wireless wake signal, such as a wake on wireless local area network or wake on Bluetooth signal to awireless network module 66 ofinformation handling system 10 to initiate a change in power state, such as a recovery from a reduced power state to an on state. In the example of a fingerprint reading,fingerprint authenticator 64 authenticates the end user based upon information provided byfingerprint reader 52 and, based upon the authentication, initiates a wireless wake withwireless network module 66. As an alternative,docking manager 56 and/or embeddedcontroller 58 communicates a command to transition power states toinformation handling system 10 throughdocking cable 24. For instance, a command sent throughdocking cable 24 todocking manager 56 ofinformation handling system 10 simulates an interrupt at embeddedcontroller 58 that would result from an input made at a keyboard or mouse during an S3 reduced power state. Although similar elements are depicted atinformation handling system 10 anddocking station 12 to implement power state transitions in response to an input atinput device 46, the functions of waking and sleepinginformation handling system 10 may be distributed across a variety of different hardware and software components. - Referring now to
FIG. 3 , a flow diagram depicts a process for transitioning an information handling system power state based upon an input at a device integrated in a docking station cable. The process begins atstep 68 with detection of an input made at an input device integrated in the docking cable, such as pushing a mechanical button or reading a fingerprint. Atstep 70, a timer is set at the docking station to monitor whether the information handling system responds to the input within a time limit. Atstep 72, the input is detected at the information handling system for an appropriate response, such as initiation of a power transition between power states, such as ACPI power states. Atstep 74, a determination is made of whether the information handling system has responded before expiration of the timer. If not, the process returns to step 72 to provide additional time for a response by the information handling system. If the timer has expired atstep 74, the process continues to step 76 to initiate a response to the input with thedocking station 76, such as by sending a command with a wireless wake signal. Atstep 78, the docking station initiates the response to the input button, such as by commanding a transition of the power state at the information handling system. In one embodiment, if an information handling system fails to acknowledge the command, the docking station presents an error at a display for the end user. - Referring now to
FIG. 4 , a block diagram depicts a docking station conversion unit integrated indocking cable 24 for converting visual information between plural formats. One difficulty with docking through a cable is that some systems will not have a connector adapted to accept a docking cable. In such instances, dockingcable 24 includes a docking cable integratedconversion module 80 that converts information from a standard protocol, such as USB, to a docking station protocol, such as will interface through adocking station connector 48. In the example embodiment depicted byFIG. 4 , aUSB connector 82 interfaces with an information handling system USB port to accept information formatted with the USB protocol. The USB formatted information includes compressed display information and other types of information, such as network communications and peripheral device communications. The USB formatted information is communicated to aUSB hub 84, where the compressed display information is separated and forwarded to adisplay module 86 for decompression. Non-display information is forwarded fromUSB hub 84 to adocking manager 56, where it is forwarded on through USB lanes in the USB protocol.Display module 86 decompresses the display information into uncompressed pixel level information, such as with the DisplayPort protocol, and provides the DisplayPort formatted information todocking manager 56 anddocking connector 48 for communication to a docking station. Docking cable integratedconversion module 80 provides an intermediate integrated cable tool that converts USB formatted information for use by adocking station 12.Docking station 12 sees the connection as a normal docking connection so that legacy information handling systems that lack docking station ports can interface with docking station peripherals, albeit at a slower data transfer rate. Although power lines are not depicted, power transfer may be provided with a power transfer module that converts power provided from dockingconnector 48 according to the DisplayPort protocol to power provided by the USB protocol for use by the information handling system atUSB connector 82. In an alternate embodiment, an information handling system that has a docking station connector interfaces with a USB docking station by connectingUSB connector 82 to the USB docking station and connecting thedocking station connector 48 to the information handling system. - Although the present invention has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (20)
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